Drugs that affect the central nervous system and alter perception, mood, and behavior are known as psychoactive substances. Psychoactive substances are commonly grouped according to whether they are stimulant s, depressant s, or hallucinogen .

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DMBQ, ferulic acid and resorcin were effective chemical signal substances in the process of seed germination and haustorium formation of Cistanche deserticola. 4.The embryo is consist of 12 cells, the endosperm cell degraded so as to provide nutrition for the embryo development .As a result, germ tube differentiated from the embryo and came out through micropylar end, the small cell at the tip of the germ tube held the capacity of cleavage and the other cells grew big ,so the germ tube elongated .The anterior extremity of germ tube swelled to form haustorium under chemical substances treatment, the haustorium cell stained ,especially its portrait because of the lignification of the cells.

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Objective To explore the change of heme substances in asthma and the relationship between heme substances and asthmatic attack.

目的 探討血紅素類物質(zhì)在哮喘中的變化及與哮喘發(fā)作的關(guān)系欧美久久综合网资源站。

The trials were carried out in field experiment and artificial climate incubator. The sugar beet growth buds were treated at 1～3pairs of true leaves with gibberellin , autix , naphthaleneacetic acid and kinetin , and the plant growth regulating substances enhancing bolting of sugar beet in the first year and its doses were selected out. The sugar beet seedling induced by temperature and light were treated by abscisic acid , maleic hydrazide , uniconazole (S-3307) and paclobutrazol (PP333), and the plant growth regulating substances which make bolting reverse and their doses were screen out. The mechanisms of bolting and bolting reversing were discussed by examining the changes of endogenous hormones, activities of correlative enzyme to bolting, soluble protein, components of amino acid in the protein, components of fatty acid. The results were as follow

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In this work, GC-MS, ICP-OES, UV-Visible Spectrophotometry were employed to determine the trace concentrations of the above six hazardous substances, and a standard method system for screening primarily, extraction, qualitative and quantitative analyses of the six substances was established and their factors were analyzed. By evaluating the relative standard deviation, recovery, repeatability, limit of detection, linear relation etc., the optimum parameters were given and thus the precision of analysis was equal to or higher than the IEC 62321 standard, meeting the requirement of RoHS.

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In every group, rabbits were subdivided into experimental and control subgroups. 2 Rabbits were bullets injected followed by continuous injected with 13C labeled leucine, glucose, and lactic acid; 3 Blood were drewed before and 150, 160, 170, and 180 min after the initiation of isotopes injection for material analysis; 4 Exhale gas were collected every 5 min in the first 30 min followed by every 30 min there after for material analysis; 5 After centrifuge in low temp the supernatant of the blood samples were collected and went through axon and anon exchange column treatment; 6 Treated blood sample was used for 13C labeled leucine, glucose lactic acid examination through mass spectrograph; 7 The exhale gas was collected for 13CO2 exam through gas-phase mass spectrograph; 8 CO2 total production rate (V13CO2), body various substances production, oxidation speed, and substances metabolic percentage all can be calculated through equations provided by references below; 9 Data was processed through student t test.

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The results indicated that washing step could result in about 60% decrease of purine substances of milkfish during processing. The main released purine substances were inosine monophosphate and inosine.

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Amino acid neurotransmitter and protein cellular factor are not only important bioactive substances in organism, but also the characteristic substances associated with some neuropathology and cancer.

氨基酸類神經(jīng)遞質(zhì)和蛋白質(zhì)類細胞因子是生物體內(nèi)重要的生物活性物質(zhì)www.99碰.com，也是某些神經(jīng)性疾病與癌癥的特征性物質(zhì)。

Bulk substances (e.g., drug substances, impurities, excipients) should be stored in opaque nonreactive containers.

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Any of vari substances, such as litmus or phenolphthalein, that indicate the presence, absence, or concentration of another substance or the degree of reaction between two or more substances by means of a characteristic change, especially in color.

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